I think that the number of engineers is representative of the part of the country that you are in (and yes, I know I ended that sentence with a preposition ). In my neck of the woods, we have less engineers in general, due to the job market being geared toward other professions and less toward engineers in general. BUT, we do have a disproportionate number of doctors and highly educated health professionals, like PhD's, etc. (myself included). But we are located smack in the middle of a huge university medical campus (literally down the street from my studio) with a medical research interest and a decent metropolis with lots of hospitals, etc., so I think while not engineers per se, the type of thinkers and such is similar across certain professions. And in my opinion, the reasons for the numbers of engineers in ballroom dancing can extrapolate well to certain other professions too.